Shaft trueness tester



May 17, 1949. A, KLOOS 2,470,404

SHAFT TRUENEss TESTER Filed May 31, 1944 2 Sheets-Sheet 1 Arnold KTOOS ATTORNEYS.

May 17, 1949. A KLOOS 2,470,404

` SHAFT TRUENEss TESTER Filed May 31, 1944 2 sheds-sheet 2 INVENTOR.

Arnold Kloos ATTORNEYS.

Patented May 17, 1949 UNITED STATES PATENT GFFICE SHAFT TRUENESS TESTER Arnold Kloos, Sharon, Pa.

Application May 31, 1944, Serial No. 538,124

2 Claims. (Cl. 33-174) This invention relates to improvements in machines for testing the trueness of shafts and other cylindrical-shaped objects.

The primary object of this invention is the provision of an improved testing machine by means of which such objects as valve stems and shafts can be accurately tested in an expeditious manner under such circumstanc-es that any inaccuracies in the trueness thereof, such as bends or other eccentricities, will be immediately detectable.

A further object of this invention is the provision of a testing machine by means of which an operator can test objects such as valve stems and shafts for cylindrical accuracy thruout the length thereof under such circumstances that where a large number of objects are to be tested, of the same size, the machine, due to the arrangement of parts, will enable such testing with facility and without changing the adjustment for which the machine is set.

Other objects and advantages of the invention will be apparent during the course of the following detailed description.

In the accompanying drawings, forming a part of this specification and wherein similar reference characters designate corresponding parts thruout the several views,

Figure 1 is a side elevation of the improved machine showing a shaft resting thereon for testing purposes.

Figure 2 is an end elevation of the machine.

Figure 3 is a plan view of the machine.

Figure 4 is an enlarged side view of a gauge and its mounting; the view being taken substantially in the position shown by line 4--4 of Figure 3.

Figure 5 is a fragmentary view showing the details of a movable support of the testing machine upon which an end of the object to be tested rests.

In the drawings, wherein for the purpose of illustration is shown only a preferred embodiment of the invention, the letter A may generally designate the improved testing machine which may consist of a frame B having a slidable supporting portion C associated therewith for supporting objects to be tested, such as a shaft D. Associated with the frame is the improved gauge supporting structure E.

The frame B preferably consists of a table-like structure including vertically positioned supporting legs lll reinforced at their lower ends by means of horizontal braces Il. At their upper ends the legs l0 at one end of the table have a cross brace I2 (shown in Figure 3) and at opposite end of the frame the legs I0 are connected together by means of a double brace structure l5 serving to support a pair of object supporting rollers l1 rotatably supported thereon by means of pins I8. The rollers l1 are preferably of disc-shaped formation and they may have chisel edged peripheries to form a line contact for effective support of the object -to be tested. The legs I0 at the ends of the frame are connected at their upper ends by horizontal circular bars or members 30 and similar bars or members 3| are provided in a connected relation with the legs l0 intermediate the ends thereof;

c the bars 30 and 3l of course are parallel, and

are preferably of circular cross section. These bars 30 and 3| form a means for slidable support of the object supporting frame C. All of the yconnections of the legs I0, bars and braces above mentioned are preferably integral, as by casting or Welding, so as to form a very strong and non-flexible frame which will not admit of any inaccuracies in testing the object.

The supporting frame C preferably consists of sleeves 50 slidably mounted upon the four horizontal bars 3U and 3l and connected together by vertical struts 5I, and a horizontal connecting bar 52 for the lower sleeves which ride upon the bars 3l. The upper sleeves 50 are connected by means of a double brace construction which supports object supporting rollers 6l upon pins 62. These rollers 6| have chisel edges and they are of the same size as the rollers ll above described. The supporting rollers upon the slidable frame B have the same dimensional relation as the rollers Il and they are in such position that the object may be supported in true horizontal position upon the peripheral edges of the rollers Il and 6I, for testing purposes. They are arranged to support the object on the longitudinal centerline of the frame B, as is obvious from Figure 3 of the drawings. It is, of course, apparent that the frame C may be slid back and forth to support an end of the object D; the purpose being to adapt the machine for testing objects of different lengths.

Referring to the gauge supporting construction E, the same includes a sleeve lilla pivotally and slidably mounted upon one of the top bars 30 of the frame B. Rigid with the sleeve lilla is an upstanding post Bla and a depending position stabilizing post 62 having a yoke structure 63 at the lower end thereof adapted to engage the lower bar 3l, as shown in Figure 4, to accurately position the post lla so that it cannot 3 accidently rock upon the shaft 30 during testing the object D. The post 6la is provided with a gauge supporting arm 64 having a socket member 65 slidably vertical along the post Ela. It can be clamped thereto in any desired vertical position by means of a thumb screw 66. The arm 64 is, of course, normal to the post Sla and at its outer end it supports a, gauge 61 of any approved' type.- The gauge 61; as is .conventional, has a plungef 68 Land a7 dial and indicator B9 facing upwardly.

In the use of the device the object D is placed upon the rollers I1 and El. To facilitate this placement, the gauge supporting frafiie' Eis pi've' otally moved upon the post 30 vand swung later; ally out of the way. To permit this movement the yoke structure 63 plays a part', since one leg 10 of the yoke can be swung in a Verticall plane upon a pivot pin 12 which is connected to the other leg 13. On the pivotpin A12 is a spring 14 wnih mondain urg'e'stn rg. "1u-towards' the les 13 for the purpose o'f gripping the' stabilizing bar' 3l ather'fi'rnly' sthat'tl'i'rewill be no liability of rocking movement f the gauge supporting pos't '6 I d'urii'i'g testing-operations. Itis apparent that `the leg 10 maybe swung upwardly' to clea'r the barl, vthe' operator grasping a' n'ger hold'lll' ul' the leg` and then the frame structure E can' be rocked' 'upon' the bar 3U to move' th'ef g'au'ge out oflpos'itin sol the object may beplac'ed upn tl'rllers.

The" yoke structur Permits' o'f the facile testing of ya large number of the' bj'ects D where they are of the s'ame dimensions", since' it is not necessary to varyi'the adjustment of the sleeve supporting 54 upf the' Fla; it only being necessary to swing the l'g 10 to clear the bar- 3|' so that the' gauge S11Illrft'in'g frame E can be ranke-dtd an out f the" way position' upon the bfa'r 30. Y During the ltesting' operation 'the` gauge frame El can be positioned at ene' .desired point and the shaft' D supported updr'rtne rollers. The frame E can lie'sl'idf along the' bar 3D to' test the' proper aligrrrnentthroughft 'the length of the object D, as'` will dite' apparent' to those skilled inl the' 'a't t Which 'this invention re'- lalt'es. y l

vendus changes ini tnshape, size and arrangement of parts n'ialy'b made to" the forrn of inventiniieri s`ho`vv'il-ar1`ddfs`riloed Without de; parting -frnrthef spirit-df triev invention or scope ofthe claims;

I claim:

1. I n a tfeiessts' machine for `shafts arid like objects tl'le combination of a frame,

. the -supporting member above its pivot axis.

2. .In a trueness testing machine for shafts and like objects the combination of a frame, means f for'lio'rizrnfitally positioning the object to be tested upon said frame, said frame including upper ad -lovverlirtal bars, a gauge, an elongated supporting member pivoted intermediate its ends upon the upper bar and slidable therealong in parallelism with an `object vsupported upon said frame, means on` the' lower" end of the supporting member engaging?- tli vl'ow'er bar' to hold a tr'ue linear ,position o'f 'the supporting' eiber as it is moved along` said 'ppe'r 'ba' 'for' testing o'bjects, an elongated gauge supporting arm, and means' supporting said ar upn tli'e' upper "portin of savspporting Inei'r'ber alove the pivot axis of tneddtte including means togclarnpthe' sauge' supporting arri'n adjusted kscssfno arodg said supporting' meriberabove pi'v'o't axis.

rEhe followingY `references vare of record inthe file of thisl patent:l

' ISATNTS" The Industrial' Yk 

